Mechanical movement



April 5, 1927. 1,623,872

H. A. HOLMES I MECHANICAL MOVEMENT Filed Dec.. 19, 1925 2 Sheets-Sheet 2 m LL 35 INVENTOR Harry fLHolmes wiineks 2 Y 8-. 5. gm I B 6W ATTORNEY Patented Apr. 5, 1927.

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1,623,872 PATENT OFFICE.

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MECHANICAL novansnr.

Application filed Decemtiir The object of this invention is to provide a special form of mechanical movement for a pump jack, and to provide special mounting means for the stationary elements of the device.

A further object is to provide a device which shall include a segmental member rotat-able with a power driven shaft, and a link thru which the segmental member projects, the link having specially formed racks on opposite sides and positioned for engagement by the segmental member, one "of the racks being engaged by this member, .on the upward stroke, and the other on the downward stroke.

A further object is to provide uniform movement, in a vertical direction, without lost motion.

With the foregoing and other objects in view, the invention consists in the novel construction and arrangement of elements described, illustrated and claimed, it being understood that modifications may be made within the scope of the claims, without de-- parting from the spirit of the invention.

In the drawings forming part of this application,

Figure 1 shows the construction in side elevation, and applied to a pump barrel.

Figure 2 is a view in elevation, from another angle.

Figure 3 is a transverse section thru the pump barrel, showing the mechanism constituting the special subject matter of this case, in top plan.

Figure 4 constitutes a vertical section thru the clamping meansand thru guiding means for the vertically movable link, the latter and the rack and pinion being in side elevation.

Figure 5 is a transverse section thru the link.

Figure 6 is a detail view showing the broken pinion, or segmental member, in perspective.

The barrel of a pump is designated 10. and afiixed thereto is a clamp including a U- member 11, and a complementary member 12, these elements 11 and 12 being secured by 50 means of bolts 13.

The member 12 not only provides one elo 1 ment of the clamp for the pump barrel, but

also provides guides for the vertically movable member carrying the racks. The flanges 55 14 and 15 are spaced to provide an opening therebetween, and are so positioned that 1925. Serial No; 76,512.

channels 16 are provided for receiving the flanged portion 17 of the link 18 on which the racks are formed in the manner illustrated in Figure 4.

The link 18' may comprise a plurality of side elements, .each provided with vertical flanges 17, as indicated, and provided with end tongues such as 20 and 21, oppositely located tongues 20 being connected by bolts 22. At the upper end, the bolts 22 pass thru the prongs of the fork 24 formed on or connected with rod 25, and the latter is connected in any suitable manner with the piston rod 26 of the pump. ber 27 is shown as having connection with element 26 and as passing thru an eye 28 carried by rod 25. The vertical movement of rod therefore imparts corresponding movement to the piston rod of the pump.

The vertical guiding elements 14 and 15 merge into outwardly extending portions 30 and 31, and these portions last named carry box members 32 and 33 cooperating with detachable box members 32 and 33, forming a bearing for shaft 34, constituting a power shaft, and being driven by means of pulley 35.

Main shaft or driving shaft 34 carries rigidly thereon a broken pinion or segmental member 36, and the oppositely located parallel portions of link 18 carry racks 38 and 39 with which the segmental member 36 is adapted to mesh. One of the teeth 38 of rack 38, and tooth 39 of the opposite rack are each longer than the remaining teeth of the respective racks, and in Figure 4 the left hand tooth of the segment 36 engages the long tooth of rack 38, it being assumed that shaft 34 is rotated in a clockwise direction, and the link 18 is forcibly carried in an upward direction for lifting the piston rod 26.

The link having moved to the limit of its upward movement, the long tooth 39' of the rack 39 will be engaged, upon the continued rotation of shaft 34 and the movement of segment 36 in a clockwise direction, and the link 18 will be forcibly moved in a downward direction, the upward and downward movement being efiected without lost motion, and without appreciable deflection of the vertically movable element, from the perpen'dicular.

In view of the construction disclosed, it will be observed that an element to be driven may be operated from either end of the jack.

A transverse mem- Having thus described the invention, what is claimed as new is:

1. In a device of the class described, a link including parallel elements having oppositely located racks formed thereon, a power shaft, a segmental member non-rotatable on the shaft and adapted to mesh with the racks, an element to be driven and having connection with the link, a clamp for connection with a pump barrel, and means connected with the clamp for guiding the link when reciprocated by the engagement of the racks by the segmental member.

2. In a device of the class described, a link including parallel elements having opposite- 1y located racks formed thereon, a power shaft, a segmental member non-rotatable on the shaft and adapted to mesh with the racks, an element to be driven and having connection with the link, a clamp for connection with a pump barrel, and means connected with the clamp for guiding the link when reciprocated by the engagement of the racks by the segmental member, and a box carried by the clamp and the means guiding the link, the box mounting the power shaft. 7

In testimony whereof I affix my signature.

HARRY A. HOLMES. 

